Sienna Miller Gushes About Working With Bradley Cooper On "American Sniper"

Sienna Miller recently expressed her enthusiasm about teaming up with Bradley Cooper on the biographical action movie "American Sniper", claiming he never broke character on set.


"He's a phenomenal actor," Miller, 32, revealed to the Boston Globe, adding: "He never broke character, so I really got to know Chris Kyle before Bradley Cooper."

"American Sniper", which opens in theaters on January 16, is about the true story of Chris Kyle, the most lethal sniper in U.S. military history.



The highly anticipated film is directed by Clint Eastwood and written by Jason Dean Hall.

Luke Grimes, Kyle Gallner, Sam Jaeger, Jake McDorman and Cory Hardrict are also included in the project.


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